Re enter to US JUST before visa expiration date

My H1 B Visa is going to expire on Nov 10 2012. I am getting married in India on October 27th and I am planning to come back to US by Nov 6th. My employer has already filed extenstion for H1 B and I should be getting it for 3 years, My real concern is that will I get into any trouble at the Port of entry as I will be arriving on Nov 6th 2012 ,just 4 days before the Visa Expiration date, Please advise